cpdef clamp(object, object, object)
cpdef copy_it(object)
cpdef bint haslen(object)
cpdef bint isint(object)
cpdef bint is_iterable(object)
cpdef len_it(object)
cpdef peek_it(object)
cpdef reverse_map(object)
cpdef bint sliceable(object)
cpdef slice_indices(object, object)
cpdef slice_it(object, object, object)
cpdef bint slice_ok(object)
